# map集合 k:v
info = {1: 'a', 2: 's', 3: 't', 4: ['x', 'x', 'x']}

for i in info:
    info.pop(i)
    print(info.get(i, ""))

# 遍历
for k, v in info.items():
    print("k:%s,v:%s" % (k, v))
# 移除
info.pop(1)
# P: 69
